US6770804B2 - Soundboard of composite fiber material construction - Google Patents

Soundboard of composite fiber material construction Download PDF

Info

Publication number
US6770804B2
US6770804B2 US09935975 US93597501A US6770804B2 US 6770804 B2 US6770804 B2 US 6770804B2 US 09935975 US09935975 US 09935975 US 93597501 A US93597501 A US 93597501A US 6770804 B2 US6770804 B2 US 6770804B2
Authority
US
Grant status
Grant
Patent type
Prior art keywords
core plate
soundboard
according
recess
fibre laminate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US09935975
Other versions
US20020066354A1 (en )
Inventor
Martin Schleske
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schleske Martin
Original Assignee
Martin Schleske
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Grant date

Links

Images

Classifications

    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10DSTRINGED MUSICAL INSTRUMENTS; WIND MUSICAL INSTRUMENTS; ACCORDIONS OR CONCERTINAS; PERCUSSION MUSICAL INSTRUMENTS; MUSICAL INSTRUMENTS NOT OTHERWISE PROVIDED FOR
    • G10D1/00General design of stringed musical instruments
    • G10D1/005Materials or treatment of materials for the manufacturing of stringed instruments
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10CPIANOS, HARPSICHORDS, SPINETS OR SIMILAR STRINGED MUSICAL INSTRUMENTS WITH ONE OR MORE KEYBOARD
    • G10C3/00Details or accessories
    • G10C3/06Resonating means, e.g. resonant strings, soundboards; Fastenings of the resonating means
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10DSTRINGED MUSICAL INSTRUMENTS; WIND MUSICAL INSTRUMENTS; ACCORDIONS OR CONCERTINAS; PERCUSSION MUSICAL INSTRUMENTS; MUSICAL INSTRUMENTS NOT OTHERWISE PROVIDED FOR
    • G10D3/00Details of, or accessories for, stringed musical instruments, e.g. slide-bars
    • G10D3/02Resonating means, horns, or diaphragms

Abstract

The invention presents a soundboard for acoustic musical instruments. Its use is possible for all acoustic musical instruments in which the sound radiation takes place by means of soundboards or resonant bodies composed of soundboards (or resonant back plates), preferably for bowed stringed instruments. The soundboard according to the invention is produced as a composite fiber sandwich. The core plate of the sandwich construction is provided with at least one recess. The soundboard according to the invention makes possible an increased sound radiation by comparison with the conventional soundboards made from solid wood or composite.

Description

The invention relates to a soundboard of composite fibre material construction comprising at least one composite fibre laminate consisting of long fibres and carrier material, such soundboard being for use in an acoustic musical instrument, particularly a bowed stringed instrument.

However, the invention can also be used for other acoustic musical instruments (such as guitars and pianos) which are provided with a resonant body or resonant back-plate.

BACKGROUND OF THE INVENTION

In recent years attempts have also been made to produce the soundboards of acoustic musical instruments in composite fibre material construction. Structures of composite fibre material construction generally consist of elongate fibres which are preferably oriented in certain directions and a carrier or matrix material which is generally a thermosetting or thermoplastic plastics material. In the preferred embodiment of the invention this is an epoxy resin system.

The previous efforts to produce soundboards of composite fibre material construction intended for acoustic musical instruments are aimed without exception at copying as well as possible the acoustic characteristics of the wood which is to be substituted. Examples of these attempts in the previously known prior art are provided for instance by DE 37 38 459 A1, EP 0 433 430 B1, U.S. Pat. No. 5,895,872 and U.S. Pat. No. 5,905,219. Thus DE 37 38 459 A1 aims at “a macroscopic heterogeneity almost equal to the wood” and states as the object that “the composite material” should “have similar characteristics to spruce”.

An unsatisfactory feature of these previously known soundboards of composite fibre material construction appears to be that from the acoustic point of view they are equivalent but in no way superior to very good solid wood soundboards of traditional construction.

The object of the invention, therefore, is to create a soundboard of composite fibre material construction which has a perceptibly better acoustic quality by comparison with excellent soundboards of traditional construction. In particular the soundboard according to the invention should have substantially higher radiated power whilst retaining the usual and desirable timbre of a solid wood soundboard.

SUMMARY OF THE INVENTION

This object is achieved according to the invention in that the core plate has at least one recess surrounded by material zones of the core plate within the area defined by the outline of the soundboard, the total volume of all recesses amounting at most to 80%, preferably between 20 and 45%, of the total volume of the core plate filled with material.

Composite fibre sandwich structures are basically constructed in such a way that a core plate of low density is provided on both sides with composite fibre laminate layers. In this case the bending strength of the structure is heavily dependent upon the thickness of the core plate. Core plates of composite fibre sandwich constructions are frequently produced from hard foam materials. Balsa wood is used for the preferred embodiment of the invention. The fibre laminate can be produced by means of layered fibre structures, fibre meshes, hand lay-up laminated individual rovings or the like, as prepreg or by means of a suitable manufacturing process. Layered fibre structures in the form of prepregs are preferably used in the construction according to the invention. These are preferably single-layer and at the same time multidirectional.

In detail, the invention is based upon the following considerations and tests:

The vibration levels of the characteristic vibrations are crucial for the sound radiation of the instrument. They are dependent upon the vibrating mass of the soundboard. The vibration resistance (so-called impedance) which the soundboard opposes to the exciting alternating force generated by the string vibrations is greater the higher the vibrating mass of the soundboard is. In order to achieve high vibrating speeds (so-called velocity) of the soundboard and thus the most effective possible sound radiation of the instrument, with a given excitation force the lowest possible vibration resistance and thus the lowest possible vibrating mass are necessary.

For these reasons it is sensible to reduce the vibrating mass of the soundboard of composite fibre material construction.

It might be thought that the required reduction of the vibrating mass could be achieved by reducing the thickness of the core plate. This possibility has proved unfavourable in so far as a reduction in the thickness of the core plate is accompanied by a reduction in the quotient of bending strength and total density. The bending strength should be high in order to achieve large-area in phase antinodes of the characteristic vibrations of the soundboard and to shift downwards the so-called cutoff frequency [Cremer, L., Heckl, M.: “Körperschall”, Berlin 1996, page 498], below which no effective sound radiation is possible any longer, and to avoid hydrodynamic short circuits [loc. cit. page 477].

A further possibility for reducing the vibrating mass of the soundboard would be to reduce the area or the weight per unit area of the fibre laminate. Here too there is a danger of a reduction in the quotient of bending strength and total density.

A third possibility for reducing the vibrating mass of the soundboard could be seen in the reduction of the board dimensions. However, this would have the disadvantage that the characteristic frequencies would be shifted upwards and as a result the timbres of the instrument would be changed in an undesirable manner.

With these considerations as a starting point, therefore, the invention follows a fundamentally different route in order to reduce the vibrating mass of the soundboard of composite fibre material construction: Recesses are provided in the core plate.

The vibrating mass of the soundboard which is reduced according to the invention enables instruments to be produced with an improved acoustic efficiency relative to the prior art.

Some embodiments of the invention are explained in greater detail below with reference to the drawings.

THE DRAWINGS

FIGS. 1a to 1 i each show a cross-section through a small segment of the area of various embodiments of the soundboard according to the invention. FIG. 2 shows an embodiment of the soundboard according to the invention using the example of a bowed stringed instrument. Finally, in FIG. 3 the perspective detail view of a surface element of the soundboard according to the invention can be seen.

DETAILED DESCRIPTION

According to the invention the core plate 1 has recesses 3 in the core plate material in at least one zone, but preferably in a plurality of zones at which the soundboard in the installed state is subjected to low bending stresses. These zones preferably lie in regions of strong antinodes of the soundboard, since there a reduction in the vibrating mass has a particularly positive effect in the sense of increasing the vibrating speed (velocity) and thus the sound radiation. In some areas of minimal static load the core plate recess 3 extends through the entire thickness of the core plate, as is shown in the embodiments in FIGS. 1a, 1 e to 1 i. As a result the fibre laminate 2 acts in these areas—apart from the desired mass reduction—in a similar manner, regarded dynamically, to a vibrating membrane, the area of which corresponds to the area of the recess. In this case, as can be seen in FIGS. 1e and 1 f, the lower fibre laminate 2 b is preferably connected via the edges of the recess 3 k to the upper fibre laminate 2 a.

The fibre laminate 2 is preferably additionally coated with a thin layer 5, which can again preferably be a layer of solid wood. FIGS. 1f and 1 g show these variants of FIGS. 1e and 1 a. In addition to the visual benefits of this embodiment there is also the advantage that the solid wood layer 5 acts jointly with the fibre laminate 2 as a membrane in some variants, as shown in FIGS. 1f, 1 g and 1 i.

In those areas of the soundboard which are subjected to higher static stresses and in which therefore a reduction of the bending strength of the soundboard must be dispensed with, the core plate recesses 3 do not extend through the entire thickness D of the core plate but has a depth less than the core plate. This is shown in FIGS. 1b to 1 d, and in this case the core plate is preferably made up of various layers 4. When the recess is positioned in the centre of the cross-section of the core plate 1 (FIG. 1b) the core plate 1 is made up of three layers 4 a to 4 c, and when the recess is positioned on one side of the cross-section (FIGS. 1c and 1 d) the core plate is made up of two layers 4 a and 4 b.

As shown in FIGS. 1h and 1 i, in some localised areas—as an extreme case of the recess 3 of the soundboard according to the invention—it may be advantageous that the volume of the core plate recess 3 is greater than that of the remaining core plate material 1. Here the remaining core plate material functions virtually as an “inner reinforcement” of the structure. In individual cases this “inner reinforcement” can even be applied only on one face of the fibre laminate 2, as shown in FIG. 1i. In the case of the embodiment shown in FIG. 1i the lower fibre laminate 2 b and the solid wood layer 5 b is stiffened by the “inner reinforcement”, whilst the upper fibre laminate 2 a with the solid wood layer 5 a can vibrate more strongly like a membrane, as described above.

These extreme cases (of a recess volume which is greater than the volume of the core material) which are illustrated in FIGS. 1h and 1 i are, however, preferably restricted to a few localised areas. Considered overall, the total volume of all recesses 3 amounting at most to 80%, preferably between 20 and 45% is markedly less than the total volume of the core plate filled with material (At 100% the total volume of al recesses would be identical to the total volume of the remaining core material).

For decoupling of the soundboard, for instance in the region of the edge, it is advantageous to reduce the thickness of the core plate. Therefore the core plate preferably has a localised difference in thickness.

FIG. 2 shows the zones of some recesses 3 within the core plate 1 using the example of the soundboard according to the invention for a violin. In the case of bowed stringed instruments the regions referred to above of high vibration level and low static stresses lie above all within the two lower cheeks 6 and upper cheeks 7. The zones of the core plate recesses 3 (three per cheek in the illustrated example, that is to say a total of twelve) are therefore preferably positioned within these four regions. Depending upon the type of acoustic musical instrument for which the soundboard according to the invention is used (above all a bowed stringed instrument, guitar or piano), these regions provided with core plate recesses 3 occupy different positions within the soundboard. The most favourable positions are preferably determined using a modal analysis. This gives information concerning the distribution of the vibration amplitudes of the soundboard. (The fibre laminate of the core plate is merely symbolised in FIG. 2 by the lines 2. The actual embodiment naturally has a substantially denser and thin-fibre fibre laminate than that symbolised in FIG. 2).

FIG. 3 shows a small segment of area of the preferred embodiment of the soundboard according to the invention which corresponds to the cross-section through the soundboard shown in FIG. 1g. The core recess 3 in this case is covered over on both faces of the core plate 1 not only by the fibre laminate 2 (i.e. on the upper face by the upper fibre laminate 2, on the lower face by the lower fibre laminate 2 b) but also by the solid wood layer 5.

Claims (10)

What is claimed is:
1. A soundboard for use in an acoustic musical instrument, said soundboard comprising a low density core plate having two opposite faces, and a fibre laminate overlying and adhered at least to one of said faces, said fibre laminate having elongate fibres embedded in a carrier, said core plate having at least one recess wholly within the confines of said core plate, the total volume of all recesses in said core plate amounting to not more than about 80% of the total volume of said core plate.
2. The soundboard according to claim 1 wherein the total volume of recesses in said core plate amounts to between about 20% and 45% of the total volume of said core plate.
3. The soundboard according to claim 1 wherein said at least one recess in said core plate extends through the entire thickness of said core plate.
4. The soundboard according to claim 1 wherein at least one recess in said core plate has a depth less than the thickness of said core plate.
5. The soundboard according to claim 1 wherein said core plate is composed of multiple layers of material overlying one another and wherein said at least one recess extends through fewer than all of said layers.
6. The soundboard according to claim 1 wherein selected areas of said core plate have different thicknesses.
7. The soundboard according to claim 1 wherein said fibre laminate is a single layer and the fibres embedded therein extended in multiple directions.
8. The soundboard according to claim 1 including a second said fibre laminate overlying and adhered to the other of said faces of said core plate.
9. The soundboard according to claim 8 including a solid layer of material overlying the exterior of each said fibre laminate.
10. The soundboard according to claim 1 including a solid layer of material overlying the exterior of said at least one fibre laminate.
US09935975 2000-08-23 2001-08-23 Soundboard of composite fiber material construction Expired - Fee Related US6770804B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE10041357.9 2000-08-23
DE10041357 2000-08-23
DE10041357 2000-08-23

Publications (2)

Publication Number Publication Date
US20020066354A1 true US20020066354A1 (en) 2002-06-06
US6770804B2 true US6770804B2 (en) 2004-08-03

Family

ID=7653500

Family Applications (3)

Application Number Title Priority Date Filing Date
US09935973 Expired - Fee Related US6737568B2 (en) 2000-08-23 2001-08-23 Soundboard of composite fiber material construction
US09935975 Expired - Fee Related US6770804B2 (en) 2000-08-23 2001-08-23 Soundboard of composite fiber material construction
US09935972 Expired - Fee Related US6610915B2 (en) 2000-08-23 2001-08-23 Soundboard of composite fibre material construction

Family Applications Before (1)

Application Number Title Priority Date Filing Date
US09935973 Expired - Fee Related US6737568B2 (en) 2000-08-23 2001-08-23 Soundboard of composite fiber material construction

Family Applications After (1)

Application Number Title Priority Date Filing Date
US09935972 Expired - Fee Related US6610915B2 (en) 2000-08-23 2001-08-23 Soundboard of composite fibre material construction

Country Status (3)

Country Link
US (3) US6737568B2 (en)
EP (2) EP1182641B1 (en)
DE (3) DE50107961D1 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050223871A1 (en) * 2004-03-29 2005-10-13 Allred Jimmie B Iii Carbon-fiber laminate musical instrument sound board
US7342161B1 (en) * 2005-08-05 2008-03-11 Charles Edward Fox Tonally improved hollow body stringed instrument
US20080156168A1 (en) * 2007-01-03 2008-07-03 Luttwak Joseph E Stringed musical instruments, and methods of making the same
US20080202309A1 (en) * 2007-02-22 2008-08-28 Wiswell John R Musical instrument and method of construction therefor
US20090183618A1 (en) * 2007-01-03 2009-07-23 Luttwak Joseph E Stringed Musical Instruments and Methods of Making Thereof
US20090188370A1 (en) * 2008-01-28 2009-07-30 Dejule Michael Clement Anti-wolf-note resonator assembly for a string instrument and method of assembling the same
US8450587B2 (en) * 2011-08-16 2013-05-28 Mcp Ip, Llc Bracing system for stringed instrument
US20150107435A1 (en) * 2013-10-22 2015-04-23 Yamaha Corporation Board for stringed instrument, method of manufacturing board for stringed instrument, and stringed instrument
US9208756B2 (en) 2013-04-22 2015-12-08 Troy Isaac Musical instrument with aggregate shell and foam filled core
US20160379607A1 (en) * 2014-12-09 2016-12-29 Aero 3 Guitars Electric guitar

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7151210B2 (en) * 2002-09-26 2006-12-19 Fender Musical Instruments Corporation Solid body acoustic guitar
US6777601B1 (en) * 2003-04-28 2004-08-17 Gregory L. Kerfoot Stringed musical instrument soundboard system
DE102004041011A1 (en) * 2004-08-24 2006-03-02 Martin Schleske Soundboard of composite fiber material construction for acoustic musical instruments
DE102004041010A1 (en) * 2004-08-24 2006-03-02 Martin Schleske Soundboard of composite fiber material construction for acoustic string instruments
US7820896B2 (en) * 2004-09-01 2010-10-26 Guobao Wang Violin with structural integrity
DE102005027424A1 (en) * 2005-06-14 2006-12-28 Martin Schleske Method for improving the acoustic characteristics of resonant wood for musical instruments
US20070084335A1 (en) * 2005-10-14 2007-04-19 Silzel John W Musical instrument with bone conduction monitor
DE102006058849A1 (en) * 2006-12-13 2008-06-19 Martin Schleske Method for improvement of acoustic characteristics of spruce tone wood for music instruments, involves exposing tone wood to development of mushroom type wood decomposing for limited treatment period
CN101393551B (en) * 2007-09-17 2011-03-23 鸿富锦精密工业(深圳)有限公司;鸿海精密工业股份有限公司 Index establishing system and method for patent full text search
US7595442B2 (en) * 2007-09-27 2009-09-29 Thomas Elgin Grover Ergonomic drumstick
US7759566B2 (en) * 2007-10-26 2010-07-20 Joseph Regh Tailoring critical properties of wood-mass, lateral and transverse stiffness, and damping-for use in musical instruments
US20090139384A1 (en) * 2007-11-29 2009-06-04 Robert Bramucci Index finger mounted guitar pick
JP5593613B2 (en) * 2009-02-12 2014-09-24 ヤマハ株式会社 Acoustic woody material, method of manufacturing the same, and acoustic instruments
WO2011008045A3 (en) * 2009-07-16 2011-04-28 Oh Hyeon Su Method for increasing resonance of instrument and the instrument
CN102097087A (en) * 2010-07-08 2011-06-15 周万昊 Guzheng soundboard
CN102486919A (en) * 2010-12-01 2012-06-06 侯凌云 Acoustic configuration of violins
WO2012082932A3 (en) * 2010-12-15 2012-11-22 Jesse Savage Soundboards and methods of manufacturing soundboard materials
US20140144305A1 (en) * 2010-12-28 2014-05-29 Andreas Hellinge Elements to improve the sound quality of stringed musical instruments
EP2839457A4 (en) * 2012-04-16 2016-03-16 Nicholas Joseph Shopa Piano plate assembly and method of manufacturing same
CN103268761B (en) * 2013-05-08 2015-07-29 天津华韵乐器有限公司 A short-fiber reinforced carbon matrix composite box piano accordion
CN203465930U (en) * 2013-09-03 2014-03-05 肯豁贸易有限公司 Acoustic string musical instrument sound box board structure
JP6156053B2 (en) * 2013-10-22 2017-07-05 ヤマハ株式会社 Method of manufacturing a stringed instrument plate

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4364990A (en) * 1975-03-31 1982-12-21 The University Of South Carolina Construction material for stringed musical instruments
DE3738459A1 (en) 1986-05-15 1989-05-24 Dominique Douau Sound-board for stringed instrument
US4969381A (en) * 1987-07-31 1990-11-13 Kuau Technology, Ltd. Composite-materials acoustic stringed musical instrument
US5171926A (en) * 1989-07-05 1992-12-15 Centre National De La Recherche Scientifique Bow musical instrument made of composite material
US5333527A (en) * 1991-08-26 1994-08-02 Richard Janes Compression molded composite guitar soundboard
US5469769A (en) * 1983-09-09 1995-11-28 Yamaha Corporation Soundboard for musical instruments
US5895872A (en) 1996-08-22 1999-04-20 Chase; Douglas S. Composite structure for a stringed instrument
US5905219A (en) 1996-01-17 1999-05-18 Westheimer; Jack L. Stringed musical instrument body and neck composition and method of making body and neck

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4353862A (en) * 1980-05-12 1982-10-12 Kaman Aerospace Corporation Method for making sound board
US4348933A (en) * 1980-10-09 1982-09-14 Currier Piano Company, Inc. Soundboard assembly for pianos or the like
US4429608A (en) * 1981-07-20 1984-02-07 Kaman Charles H Stringed musical instrument top
JPH06348255A (en) * 1993-06-04 1994-12-22 Fujigen Kk Electric guitar
GB2289366B (en) * 1994-05-13 1998-04-29 Joseph Harold Stephens Musical instruments
JP4055962B2 (en) * 1996-03-11 2008-03-05 ヤマハ株式会社 Soundboard of the piano

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4364990A (en) * 1975-03-31 1982-12-21 The University Of South Carolina Construction material for stringed musical instruments
US5469769A (en) * 1983-09-09 1995-11-28 Yamaha Corporation Soundboard for musical instruments
DE3738459A1 (en) 1986-05-15 1989-05-24 Dominique Douau Sound-board for stringed instrument
US4969381A (en) * 1987-07-31 1990-11-13 Kuau Technology, Ltd. Composite-materials acoustic stringed musical instrument
US5171926A (en) * 1989-07-05 1992-12-15 Centre National De La Recherche Scientifique Bow musical instrument made of composite material
EP0433430B1 (en) 1989-07-05 1995-11-02 Centre National De La Recherche Scientifique Bowed instrument made of a composite material
US5333527A (en) * 1991-08-26 1994-08-02 Richard Janes Compression molded composite guitar soundboard
US5905219A (en) 1996-01-17 1999-05-18 Westheimer; Jack L. Stringed musical instrument body and neck composition and method of making body and neck
US5895872A (en) 1996-08-22 1999-04-20 Chase; Douglas S. Composite structure for a stringed instrument

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050223871A1 (en) * 2004-03-29 2005-10-13 Allred Jimmie B Iii Carbon-fiber laminate musical instrument sound board
US20070163418A1 (en) * 2004-03-29 2007-07-19 Allred Jimmie B Iii Carbon-Fiber Laminate Musical Instrument Sound Board
US7276868B2 (en) * 2004-03-29 2007-10-02 Allred Iii Jimmie B Carbon-fiber laminate musical instrument sound board
US7342161B1 (en) * 2005-08-05 2008-03-11 Charles Edward Fox Tonally improved hollow body stringed instrument
US20080156168A1 (en) * 2007-01-03 2008-07-03 Luttwak Joseph E Stringed musical instruments, and methods of making the same
US7795513B2 (en) 2007-01-03 2010-09-14 Luttwak Joseph E Stringed musical instruments, and methods of making the same
US20090183618A1 (en) * 2007-01-03 2009-07-23 Luttwak Joseph E Stringed Musical Instruments and Methods of Making Thereof
US7763784B2 (en) 2007-01-03 2010-07-27 Luttwak Joseph E Stringed musical instruments and methods of making thereof
US20080202309A1 (en) * 2007-02-22 2008-08-28 Wiswell John R Musical instrument and method of construction therefor
US7687695B2 (en) 2008-01-28 2010-03-30 Dejule Michael Clement Anti-wolf-note resonator assembly for a string instrument and method of assembling the same
US20090188370A1 (en) * 2008-01-28 2009-07-30 Dejule Michael Clement Anti-wolf-note resonator assembly for a string instrument and method of assembling the same
US8450587B2 (en) * 2011-08-16 2013-05-28 Mcp Ip, Llc Bracing system for stringed instrument
US9018500B2 (en) 2011-08-16 2015-04-28 Mcp Ip, Llc Bracing system for stringed instrument
US9208756B2 (en) 2013-04-22 2015-12-08 Troy Isaac Musical instrument with aggregate shell and foam filled core
US20150107435A1 (en) * 2013-10-22 2015-04-23 Yamaha Corporation Board for stringed instrument, method of manufacturing board for stringed instrument, and stringed instrument
US9666168B2 (en) * 2013-10-22 2017-05-30 Yamaha Corporation Board for stringed instrument, method of manufacturing board for stringed instrument, and stringed instrument
US20160379607A1 (en) * 2014-12-09 2016-12-29 Aero 3 Guitars Electric guitar
US9607588B2 (en) * 2014-12-09 2017-03-28 Aero 3 Guitars Electric guitar
US9911401B2 (en) 2014-12-09 2018-03-06 Aero 3 Guitars Electric guitar

Also Published As

Publication number Publication date Type
DE50107960D1 (en) 2005-12-15 grant
US20020066353A1 (en) 2002-06-06 application
US20020066354A1 (en) 2002-06-06 application
DE20113495U1 (en) 2001-10-31 grant
EP1182641A2 (en) 2002-02-27 application
US6737568B2 (en) 2004-05-18 grant
US20020069743A1 (en) 2002-06-13 application
EP1182642A3 (en) 2003-11-26 application
DE50107961D1 (en) 2005-12-15 grant
US6610915B2 (en) 2003-08-26 grant
EP1182641A3 (en) 2003-09-10 application
EP1182642A2 (en) 2002-02-27 application
EP1182641B1 (en) 2005-11-09 grant
EP1182642B1 (en) 2005-11-09 grant

Similar Documents

Publication Publication Date Title
Schelleng The violin as a circuit
US5198601A (en) Tuning means for stringed musical instrument
US4364990A (en) Construction material for stringed musical instruments
US3915049A (en) Stringed musical instrument with aluminum made integral unit
US5952592A (en) Acoustic guitar assembly
US4079654A (en) Bracing structure for stringed musical instrument
US4738178A (en) Electric stringed instrument having sound characteristics of banjos and guitars
US20080105101A1 (en) Split solid body electric guitars
US6103961A (en) Stringed musical instrument
US5123326A (en) String musical instrument with tone engendering structures
US5469770A (en) Distributed load soundboard system
US4770929A (en) Light-weight composite material
US5251526A (en) Rotating electrical stringed instrument
US4846039A (en) Neck for stringed musical instruments
US4084476A (en) Reinforced stringed musical instrument neck
US4873907A (en) Composite-materials acoustic stringed musical instrument
US20070017353A1 (en) Electronic keyboard musical instrument
US6683236B2 (en) One piece composite guitar body
US3427915A (en) Acoustic panels
US6664452B1 (en) Acoustic guitar having a composite soundboard
US6294718B1 (en) Stringed musical instrument top member
US4846038A (en) Neck structure for stringed instruments
US5218159A (en) Elastic pickup saddle for stringed instruments
US5333527A (en) Compression molded composite guitar soundboard
US6120910A (en) Stringed musical instrument

Legal Events

Date Code Title Description
FPAY Fee payment

Year of fee payment: 4

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
FP Expired due to failure to pay maintenance fee

Effective date: 20120803